tts-speak

A standard Text To Speech wrapper with multiple providers support.

Once the sound file is generated, find an installed audio player and play the sound.

Features

• One wrapper for all tts providers (ideal for testing)
• Multiplatform Audio Playing (mplayer, afplay, mpg123, mpg321, play)
• Cache generated audio files (and protect your ratio against limitation for online providers)
• Multilingual

Installation

npm install --save tts-speak

TTS Providers

You can use one of those providers to generate audio files from your text :

• tts.js : A local tts engine, that is not perfect but which support many languages
• api.voicerss.org : An API required service with beautiful voices and a large language support
• google : Use the well known translate_tts service from google

TTS.js

First you have to add the tts.js module to your project.

npm install --save tts.js

Example code :

// Create the wrapper with "tts.js" provider with full options
var Speak = require('tts-speak');
var speak = new Speak({
    tts: {
        engine: 'tts',                  // The engine to use for tts
        lang: 'en-us',                  // The voice to use
        amplitude: 100,                 // Amplitude from 0 to 200
        wordgap: 0,                     // Gap between each word
        pitch: 50,                      // Voice pitch
        speed: 60,                      // Speed in %
        cache: __dirname + '/cache',    // The cache directory were audio files will be stored
        loglevel: 0,                    // TTS log level (0: trace -> 5: fatal)
        delayAfter: 700                 // Mark a delay (ms) after each message
    },
    speak: {
        engine: 'auto',                 // Auto select the audio player
        volume: 100,                    // Volume in %
        loglevel: 0                     // Audio player log level
    },
    loglevel: 0                         // Wrapper log level
});

api.voicerss.org

To use this provider, you have to request an API key by registering on http://www.voicerss.org/api/demo.aspx

Example code :

// Create the wrapper with "voicerss" provider with full options
var Speak = require('tts-speak');
var speak = new Speak({
    tts: {  
        engine: {                       // The engine to use for tts
            name: 'voicerss',           
            key: 'XXXXXXXXXXXXXXX',     // The API key to use
        },
        lang: 'en-us',                  // The voice to use
        speed: 60,                      // Speed in %
        format: 'mp3',                  // Output audio format
        quality: '44khz_16bit_stereo',  // Output quality
        cache: __dirname + '/cache',    // The cache directory were audio files will be stored
        loglevel: 0,                    // TTS log level (0: trace -> 5: fatal)
        delayAfter: 0                   // Mark a delay (ms) after each message
    },
    speak: {
        engine: 'auto',                 // Auto select the audio player
        volume: 100,                    // Volume in %
        loglevel: 0                     // Audio player log level
    },
    loglevel: 0                         // Wrapper log level
});

Google

// Create the wrapper with "google" provider with full options
var Speak = require('tts-speak');
var speak = new Speak({
    tts: {
        engine: 'google',               // The engine to use for tts
        lang: 'en-us',                  // The voice to use
        cache: __dirname + '/cache',    // The cache directory were audio files will be stored
        loglevel: 0,                    // TTS log level (0: trace -> 5: fatal)
        delayAfter: 500                 // Mark a delay (ms) after each message
    },
    speak: {
        engine: 'auto',                 // Auto select the audio player
        volume: 100,                    // Volume in %
        loglevel: 0                     // Audio player log level
    },
    loglevel: 0                         // Wrapper log level
});

Usage

Once the speak instance is ready, you can generate and play tts.

speak.once('ready', function() {

    // Chaining
    speak
        .say("Hello and welcome here !")
        .wait(1000)
        .say({
            src: 'Parlez-vous français ?',
            lang: 'fr-fr',
            speed: 30
        });

    // Catch when all queue is complete
    speak.once('idle', function() {
        speak.say("Of course, with my new text to speech wrapper !");
    });

});

Chainable Methods

speak.say(obj)

obj can be a string or an object that is able to override default config.

speak.wait(ms)

ms indicates the time in milliseconds to wait before continue.

speak.stop()

Clean the queue and kill audio player if playing.

Events (on or once)

speak.on('ready', fn)

When all interfaces are ready.

speak.on('idle', fn)

When queue is complete after a job.

speak.on('play', fn)

When a sound file is played.

speak.on('pause', fn)

When a pause is marked.

speak.on('stop', fn)

When all jobs are canceled.